I've never heard that one before. For most, [money] is the water that the fish swim in. Most don't see it, don't choose it, and aren't aware of any other way.
Let's make a list:
- "The purpose of money is to be spent." This is probably the most common perspective. "Monkey earn. Monkey buy."
- "You're as wealthy as your credit limit." (See above)
- "The purpose of money is to put it to work and make more money for you so you can increase the amount of money you have." I saw that in the financial world where money is basically used for keeping score. It's a metric to be improved for the sake of improving it.
- "The purpose of money is to put it to work so you don't have to." This perspective blew my mind back in 2002ish or so. You've probably seen the drawings with the arrows in ERE book chapter 7.
- "Money is like tap water". Money is an unlimited resource for all practical purposes (as it relates to your lifestyle). It doesn't mean you have billions but that money is no longer the limiting resource in terms of what you can do. (It's usually skills, connections, or creativity)